<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col><el-button type="primary" @click="addDialogVisible = true">添加角色</el-button></el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe >
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag type="primary" closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环,渲染嵌套二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 通过for循环,渲染嵌套三级权限 -->
                  <el-col :span="18">
                    <el-tag v-for="item3 in item2.children" :key="item3.id" type="danger" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
              {{ scope.row }}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作">
          <!-- 作用域插槽 -->
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">修改</el-button>

            <!-- 删除按钮 -->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)">删除</el-button>
            <!-- 分配权限按钮 -->
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            <!-- 添加角色的对话框 -->
            <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
              <!-- 对话框内容主体区域 -->
              <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                  <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                  <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
              </el-form>
              <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
              </span>
            </el-dialog>
            <!-- 修改角色的对话框 -->
            <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="30%" @closed="editDialogClosed">
              <el-form :model="addForm" :rules="addFormRules" ref="editFormRef" label-width="100px">
                <el-form-item label="角色名称">
                  <el-input v-model="addForm.roleName" disabled></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                  <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
              </el-form>
              <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
              </span>
            </el-dialog>
            <!-- 分配权限的对话框 -->
            <el-dialog title="分配权限" :visible.sync="setDialogVisible" width="50%" @close="setRightDialogClosed">
              <!-- 树形控件 -->
              <el-tree :data="rightsList" :props="treeProps" node-key="id" show-checkbox default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
              <span slot="footer" class="dialog-footer">
                <el-button @click="setDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
              </span>
            </el-dialog>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        rolesInfo: {
          // 角色名称
          roleName: 'admin6',
          // 角色描述
          roleDesc: '',
        },
        //  所有角色列表数据s
        roleList: [],
        // 添加角色表单数据
        addForm: {
          roleId: '',
          roleName: '',
          roleDesc: '',
        },
        // 添加表单规则验证对象
        addFormRules: {
          roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' },
            {
              min: 3,
              max: 10,
              message: '长度在 3 到 10 个字符',
              trigger: 'blur',
            },
          ],
          roleDesc: [
            { required: true, message: '请输入角色描述', trigger: 'blur' },
            {
              min: 3,
              max: 10,
              message: '长度在 3 到 10 个字符',
              trigger: 'blur',
            },
          ],
        },
        // 控制用户对话框的显示与隐藏
        addDialogVisible: false,
        // 控制修改角色对话框的显示与隐藏
        editDialogVisible: false,
        // 查询到的用户信息对象
        editForm: {},
        // 控制权限对话框的显示与隐藏,默认为false
        setDialogVisible: false,
        // 所有的权限数据
        rightsList: [],
        // 定义树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children',
        },
        // 默认选中的节点id数值
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: '',
      }
    },
    created() {
      this.getRoleList()
    },

    methods: {
      // 获取所有角色列表
      async getRoleList() {
        const { data: res } = await this.$http.get('roles')
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败')
        }
        this.roleList = res.data
        console.log(this.roleList)
      },

      // 监听添加用户对话框清除关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },

      // 点击按钮添加新用户
      addUser() {
        this.$refs.addFormRef.validate(async (valid) => {
          if (!valid) return
          console.log(valid)
          //可以发起添加用户的网络请求
          const { data: res } = await this.$http.post('roles', this.addForm)

          if (res.meta.status !== 201) {
            this.$message.error('添加用户失败')
          }
          this.$message.success('添加用户成功')
          //  隐藏添加用户对话框
          this.addDialogVisible = false
          // 重新获取列表数据
          this.getRoleList()
        })
      },

      // 点击按钮弹出展示编辑用户信息的对话框
      async showEditDialog(id) {
        console.log(id)
        const { data: res } = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('查询用户信息失败')
        }
        this.editForm = res.data
        console.log(res)
        this.editDialogVisible = true
      },
      // 监听修改用户对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      // 修改用户信息并提交预验证
      editUserInfo() {
        this.$refs.editFormRef.validate(async (valid) => {
          if (!valid) return
          // 发起修改用户信息的数据请求
          const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc,
          })

          if (res.meta.status !== 200) {
            this.$message.error('更新用户信息失败')
          }

          //  隐藏添加用户对话框
          this.editDialogVisible = false
          // 重新获取列表数据
          this.getRoleList()
          // 提示修改成功
          this.$message.success('更新用户信息成功')
        })
      },
      // 点击删除按钮删除用户
      async removeUserById(id) {
        console.log(id)
        const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }).catch((error) => error)
        console.log(confirmResult)
        // 如果用户取消删除则返回字符串cancel
        // 如果用户确认删除则返回字符串confirm
        if (confirmResult == 'cancel') {
          return this.$message.info('已取消删除')
        }
        // 发起请求删除单个用户的数据请求
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除用户失败')
        }
        this.$message.success('删除用户成功')
        this.getRoleList()
      },
      // 根据id点击删除三级权限标签
      async removeRightById(role, rightId) {
        //  弹框提示用户是否删除
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }).catch((err) => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除')
        }
        console.log('确认删除')

        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败')
        }

        role.children = res.data
      },
      // 点击打开获取权限对话框获取数据
      async showSetRightDialog(role) {
        // 弹出对话框的同时获取角色的id,供以后使用
        this.roleId = role.id
        const { data: res } = await this.$http.get('rights/tree')

        if (res.meta.status !== 200) {
          return this.$message.eerror('获取权限数据失败')
        }
        // 把获取到的权限数据保存到data中
        this.rightsList = res.data
        console.log(this.rightsList)

        // 递归获取三级节点的id
        this.getLeafKeys(role, this.defKeys)

        this.setDialogVisible = true
      },
      // 通过递归函数的形式,获取角色下所有三级权限的id,并保存到defkeys数组中
      getLeafKeys(node, arr) {
        // 如果当前node节点不包含children属性,则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }

        node.children.forEach((item) => this.getLeafKeys(item, arr))
      },
      // 监听分配权限的对话框关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights() {
        // 获取处于全选和半选的id值,并合并为一个完整的数组
        const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
        // 分割字符串keys
        const idStr = keys.join(',')
        console.log(keys)
        console.log(idStr)

        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功')

        this.getRoleList()
        this.setDialogVisible = false
      },
    },
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }
  .bdtop {
    border-top: 1px solid #eee;
  }
  .bdbottom {
    border-top: 1px solid #eee;
  }
  .vcenter {
    display: flex;
    align-items: center;
  }
</style>